Watchman&#39;s clock.



No. 885,366. PATBNTED APP.. 21, 1908.

' A. A. NEWMAN.

WATGHMANS CLOCK. APPLICATION FILED DEU. 4, 1906.

UNITED SIAISESMu ABRAHAM A. NEWMAN,

OF CHICAGO, ILLINOIS.

WATCHMANS CLOCK.

Application filed December 4, 1906.

To all 'whom it may concern: e

Beit known that I, ABRAHAM A. NEWMAN, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Watchmens Clocks, of which thefollowing is a speciiication.

My invention relates to certain new and useful improvements in watchmensclocks, and is fully described and explained in this specification andshown in the accompanying drawings, in which Figure 1 is a sideelevation of my improved clock, a portion of the side walls of the casebeing broken away to show the interior construction, and certain of theparts being shown in the section indicated in the line 1 1 of Fig. 3;Fig. 2 is a similar view showing the parts in a different operativeposition; Fig. 3 is a top plan of the clock, a portion of the case beingbroken away in the section indicated by the line 3-3 in Fig. 1 and Fig.4L is a perspective view of one of the keys which are used.

Referring to the drawings, A, is a suitable dial, preferably of paper orthe like, which is adapted to be rotated by means of suitable clockmechanism, not here illustrated. Above this dial is a plate, B, having aslot, l), through which access may be had to the dial from above. Thespace above the plate, B, is divided into two parts by means of avertically extending plate, C, the space to the right-hand side of thisplate, as viewed in Fig. 3, being utilized as the key-space of theclock, and the space to the left-hand side of this plate being utilizedas a container for the clock-mechanism.

D, indicates a movable plate which is provided with slots, d, runningover screws, c, on the plate, O, so that said plate, D, can be movedlongitudinally and said plate is normally held in the position shown inFig. 1 by means of a spring, D1, connecting the movable plate with astationary point upon the plate, O. yThe plate, C, is provided with anear, D2, extending at right angles to its plane, said ear being of suchsize as to lie over and cover completely the slot, b, in the plate, B,and being so positioned that when the plate, D, is in its normalposition it will cover said slot. One end of the plate, D, is providedwith a cam-surface, D3, the extreme portion of which is formed into apoint, D4. The wall of the clock case is provided with a suitablekey-hole in line with which is placed a Specification of Letters Patent.

Patented April 21, 1908.

Serial No. 346,277.

key-guide, E, adapted to enter a hole, f, in the shank of a key, F. Eachof the keys, F, comprises, in addition to its longitudinally extendingshank and the handle thereon by which it may be rotated, a substantially'liat web, f1, extending preferably tangentially yfrom the shank of thekey, a short web, f2,

substantially at right angles to the web, f1, a web,j'3, forming anobtuse angle with reference to the web,f2, and a fourth web,f1,substantially at right angles to the web,f3, and forming an acute anglewith reference to the web, f1. Each of the keys has along the edge ofthe web, f4, a projecting point or marker adapted to engage thepaper-dial and make a perforation therein, and each key is also rovidedwith a projecting shoulder, f, which is adapted to engage with thecamsurface, D3, upon the movable plate, D4.

In operation the key is inserted into the clock in the position shown inFig. 1, the keyhole of the clock being so arranged that the key mustenter in this angular position. It is then rotated through an angle ofnearly one hundred and eighty degrees to the position shown in Fig. 2,and during this movement the shoulder, f, engages with the cam-surfaceupon the movable plate, D, and forces the same against the action of thespring, D1, into the position shown in Fig. 2, and in fact slightlybeyond this position so as to expose the slot, b, in the plate, B, andpermit the passage of theprojecting marker, f5, upon the key to thedial. During this movement and towards its end the shoulder rides overthe projecting point, D4, upon the plate, D, so that during the finalportion of the movement of the key its rotation is assisted by thespring, D1, instead of being resisted thereby as it is during the Yfirstportion of its movement.

My device is particularly advantageous for a number of reasons. In thefirst place, until a suitable key is placed in the clock, the slot isclosed, so that no access can be had to the lent instrument.Furthermore, a clear impression is assured by reason of the fact thattowards the end of its movement the key is assisted in rotation by theaction of the cam, D3. Furthermore, by placing the key-hole in such aposition that the key must rotate approximately one hundred and eightydegrees and make it extremely difficult to reach the slot in the plate,B, through which the key enters with any instrument but a propdial tomake a perforation with a frauduerly constituted key, and I also makethe key of such form as to render its fraudulent duplication extremelydifficult.

l realize that considerable variation is possible in the details of thisconstruction without departing from the spirit of my invention;therefore, I do not intend to limit myself to the specific form hereinshown and described.

l claim as new and desire to secure by Letters Patent :d

1. The combination with a casing having an opening for the entrance of akey, of a septum within the case and between the normal position of thedial and the opening aforesaid, a perforation in the septum, and meansnormally closing the perforation in said septum and constructed andarranged to be actuated by a key in its movement to uncover theperforation in the septum for the passage of a key.

2. The combination with a case having an opening for the passage of akey, of a septum separating said opening from the normal position of thedial, said septum being provided with a perforation whereby a key mayhave access to a dial, a cover for said perforation normally closing thesame, and means whereby a key may move said cover to expose saidperforation for its passage.

3. The combination with a casing having a key-hole, of a septum withinthe casingbetween said key-hole and the normal position of the dial,said septum being provided with a suitable perforation, a cover adaptedto close said perforation, means for holding said cover in positionnormally to close said perforation, and means whereby the movement ofthe key will move said cover against the action of said holding means toopen the perforation for the passage of the key.

4. The combination with a casing having a key-hole, of a septum withinthe casing between the key-hole and the normal position of the dial,said septum being provided with a perforation, a cover adapted to closesaid perforation and a cam upon said cover adapt-` ed to be engaged by asuitable key to move said cover and open said perforation for thepassage of the key.

5. The combination with a casing having a key-hole therein, of a septumlying between said key-hole and the normal position of the dial, saidseptum being provided with a perforation, a sliding plate having an earadapted to close said perforation, and a cam-surface upon said plateadapted to be engaged by a suitable key to move said plate for thepurpose of uncovering said perforation.

6. The combination with a casing having a key-hole therein, of a septuminterposed between said key-hole and the normal position of the dial,said septum being rovided Witha suitable perforation, a movab e coverada ted to close said perforation, means for ho ding said cover normallyin position to close said perforation, and a cam-surface having aprojecting point over which a key may ride whereby the rotation of asuitable key will ABRAHAM A. NEWMAN.

l/Vitnesses:

C. W. WASHBURNE, J. H. LANDES.

